Hull City are sweating on the fitness of key strikers Shane Long and Sone Aluko for the Premier League run-in.
Aluko missed the 3-0 defeat to Arsenal on Sunday due to a hamstring injury, while Long was forced off at half-time after taking a blow to the calf.
Hull have yet to secure their top-flight status for next season, although they are expected to avoid the drop as they sit six points above the relegation zone with four games remaining.
But manager Steve Bruce admits the injuries to Long and Aluko are a cause for concern, and he is unsure if they will be able to return before the end of the season.
"Long's got a calf injury," said Bruce. "We'll see how he is but he's got a whack to the back of his calf.
"He'll be touch and go for the weekend (away to Fulham), I would have thought."
Aluko has missed much of the season with Achilles problems and his latest injury, suffered in training, is likely to keep him out of the Fulham clash.
"Sone Aluko unfortunately nicked a hamstring on Thursday," said Bruce. "It's unfortunate because we were just seeing Sone again.
"It's getting a bit too often with Sone, we get him up to speed and unfortunately he breaks down again and that's a disappointment.
"I think he's only played three 90 minutes this season so it's a real concern."